Path: utzoo!attcan!uunet!mcsun!ukc!acorn!agodwin
From: agodwin@acorn.co.uk (Adrian Godwin)
Newsgroups: sci.electronics
Subject: VGA mode sensing
Keywords: VGA, monitors
Message-ID: <3943@acorn.co.uk>
Date: 5 Nov 90 11:58:20 GMT
Sender: agodwin@acorn.co.uk
Organization: Acorn Computers Ltd, Cambridge, UK
Lines: 18


I'm trying to connect a Mitsubishu high-resolution monitor (32kHz, BNC inputs,
no concessions at all to VGA standards, which it pre-dates) to the VGA port
on a Compaq 386.

It works fairly well, but only in monochrome. The Compaq's self-determining
setup detects a Mono VGA monitor, and won't do colours.

I've found some references to the possibility that the loading on the RGB
signals are used to configure the monitor type, and the ID bits on the VGA
connector (pins 11, 12, possibly pin 4) are ignored.

Does anyone know for sure what the rules are ? 
What about SVGA - is that monitor capability sensed automatically too ?

Thanks in advance,

-adrian